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Glazing just means the windows in your house, including both openable and fixed windows, as well as doors with glass and skylights. Glazing actually just means the glass part, but it is generally utilized to refer to all elements of an assembly consisting of glass, films, frames and home furnishings. Paying attention to all of these elements will assist you to achieve effective passive design.

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Energy-efficient glazing makes your house more comfy and drastically decreases your energy expenses. However, improper or poorly developed glazing can be a significant source of undesirable heat gain in summer and considerable heat loss and condensation in winter season. Approximately 87% of a home's heating energy can be gotten and approximately 40% lost through windows.

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Glazing is a considerable financial investment in the quality of your home. An initial financial investment in energy-efficient windows, skylights and doors can considerably reduce your annual heating and cooling bill.

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This tool compares window selections to a base level aluminium window with 3mm clear glass. Comprehending some of the key homes of glass will assist you to choose the very best glazing for your home. Secret properties of glass Source: Adjusted from the Australian Window Association The quantity of light that travels through the glazing is called noticeable light transmittance (VLT) or visible transmittance (VT).

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The U worth for windows (expressed as Uw), explains the conduction of the whole window (glass and frame together). The lower the U worth, the greater a window's resistance to heat flow and the better its insulating worth.

For example, if your house has 70m2 of glazing with aluminium frames and clear glass with a U value of 6. 2W/m2 C, on a winter's night when it is 15C colder outside compared to indoors, the heat loss through the windows would be: 6. 2 15 70 = 6510W That is equivalent to the overall heat output of a big room gas heating system or a 6.

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If you select a window with half the U worth (3. 1W/m2 C) (for example, double glazing with an argon-filled gap and less-conductive frames), you can cut in half the heat loss: 3. 1 15 70 = 3255W The solar heat gain coefficient (SHGC) for windows (revealed as SHGCw) measures how readily heat from direct sunlight streams through a whole window (glass and frame together).

The lower a window's SHGC, the less solar heat it transfers to the home interior. The actual SHGC for windows is affected by the angle that solar radiation strikes the glass.

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When the sun is perpendicular (at 90) to the glass, it has an angle of incidence of 0 and the window will experience the maximum possible solar heat gain. The SHGC declared by glazing makers is always calculated as having a 0 angle of incidence. As the angle increases, more solar radiation is shown, and less is transmitted.